# 对所有级别为1级的员工，级别上升1级，薪水增加1000
my_dict = {
    "张三": {"部门": "科技部", "工资": 3000, "级别": 1},
    "李四": {"部门": "市场部", "工资": 5000, "级别": 2},
    "王五": {"部门": "市场部", "工资": 7000, "级别": 3},
    "赵六": {"部门": "科技部", "工资": 4000, "级别": 1},
    "孙七": {"部门": "市场部", "工资": 6000, "级别": 2},
}

for k in my_dict:
    if my_dict[k]["级别"] == 1:
        my_dict[k]["级别"] = 2
        my_dict[k]["工资"] = my_dict[k]["工资"] + 1000

print(my_dict)